Our paper was an analysis of an already established technique used nearly identically by a number of previous papers. We dug up about a dozen IIRC, including t

Our paper was an analysis of an already established technique used nearly identically by a number of previous papers. We dug up about a dozen IIRC, including the seminal ones, but we missed his. He didn't go after us for not citing him (which he had divined). He went after us for not acknowledging that he invented it (which he did not).